Switch to new Superuser

Change-Id: I9d91392ad6fbc9953d19059ab59b91d214c00e0c
Hide Superuser entry if root access for apps is disabled.

Change-Id: Ibb77ba5a0fccf22564a26b8b1e13f7762c65718e

Conflicts:
	src/com/android/settings/DevelopmentSettings.java

 Author:    Danny Baumann <dannybaumann@web.de>
	modified:   src/com/android/settings/DevelopmentSettings.java
	modified:   src/com/android/settings/Settings.java
try to add preference menu

...

 Changes to be committed:
	modified:   res/values/strings.xml
	modified:   res/xml/settings_headers.xml